baber/WOPTO huggingface dataset:
Patent WO-2019200997-A1 (WO)
Title: Obstacle determining method for mobile robot, storage medium, and mobile robot
Inventor: WANG SHIQUN
IPC: G05D1/00
Filed: 2019-01-26
Abstract: An obstacle determining method for a mobile robot, comprising the steps of: S101: divide a walk path of a mobile robot into at least two actions, and configure corresponding predetermined completion periods for the actions; S102: the mobile robot walks using a given action; S103: detect whether a duration of the current action of the mobile robot reaches the corresponding predetermined completion period; if yes, enter step S104; if not, continue to walk using the current action; S104: the mobile robot walks using the other action, and then return to step S103; S105: repeat steps S103 to S104 till the mobile robot completes walk path planning. Also provided are a storage medium and a mobile robot, such that the obstacle determining accuracy of a mobile robot can be improved.
Patent WO-2019149189-A1 (WO)
Inventor: ZHAO MIAOMIAO
IPC: G06Q30/02
Filed: 2019-01-29
Abstract: 一种用于数据处理的方法及装置，涉及计算机信息处理领域，该方法包括：接收并响应用户对预定商品的购买指令，所述预定商品包括价格浮动商品（S202）；通过所述预定商品的相关信息提取所述预定商品的属性信息（S204）；根据所述预定商品的属性信息由堆栈中确定多个第一商品中的一个作为所述预定商品的补价商品（S206）；以及通过所述预定商品与所述补价商品生成下单数据（S208）。该方法和装置能够对于价格变动频繁，需要在下单时刻获得供应商实时销售价的交易中，进行差价补充商品定位、商品应付金额校准，避免商品购买过程中的体验问题与订单合同纠纷。
Patent WO-2020155201-A1 (WO)
Inventor: LIU GUOFENG
IPC: B23K26/00
Filed: 2019-02-18
Abstract: 本申请提供了一种焊接组件及电池模组。该焊接组件包括：第一焊接件；和第二焊接件，与所述第一焊接件焊接固定并形成焊缝；其中，在所述焊缝的至少一侧设置有排气通道；所述排气通道位于所述第一焊接件与所述第二焊接件之间。本申请中，焊接时产生的废气能从排气通道排出，以防进入到焊缝中导致降低焊缝强度。
Patent WO-2019242317-A1 (WO)
Title: 移位寄存器单元及其驱动方法、栅极驱动电路及显示装置
Inventor: XIE YONGXIAN
IPC: G11C19/28
Filed: 2019-02-18
Abstract: 一种移位寄存器单元(10)及其驱动方法、栅极驱动电路(20)及显示装置(30)，移位寄存器单元(10)包括输入电路(100)、输出电路(200)、第一复位电路(300)和复位控制电路(400)。输入电路(100)配置为响应于输入信号对第一节点(PU)的电平进行控制；输出电路(200)配置为在第一节点(PU)的电平的控制下，将时钟信号(CLK)输出至输出端(OT)；第一复位电路(300)配置为响应于第一复位信号(Re1)对第一节点(PU)进行复位；复位控制电路(400)配置为响应于复位控制信号和基准信号向第一复位电路(300)输入第一复位信号(Re1)，以开启第一复位电路(300)。移位寄存器单元(10)可解决低温环境下降噪晶体管沟道电流降低导致的第一节点(PU)降噪不充分的问题，避免产生多次输出的现象，保证产品的正常工作。
Patent WO-2020172763-A1 (WO)
Title: 力感应装置、力阵列感应模块及其力感应元件
Inventor: SU JUI-YIAO
IPC: G01L1/18
Filed: 2019-02-25
Abstract: 一种力感应装置(100)，包括一力阵列感应模块(110)、一基板(112)、至少一凸起部(113、117)以及一保护层(114)。力阵列感应模块(110)具有至少一力感应元件(120)。基板(112)用以抵靠力阵列感应模块(110)。至少一凸起部(113、117)与至少一力感应元件(120)的位置相对应。保护层至少覆盖力阵列感应模块(110)及基板(112)的周围。
Patent WO-2019165989-A1 (WO)
Inventor: HE ZHANYING
IPC: G06N3/063
Filed: 2019-02-28
Abstract: A data processing circuit, related to the field of digital circuits, comprising a first calculation circuit and an input control circuit. The first calculation circuit comprises one or more calculation subcircuits. Each calculation subcircuit comprises a first addition operation circuit, a multiplication operation circuit, a first comparison operation circuit, and a first nonlinear operation circuit, where the first nonlinear operation circuit comprises at least one of an exponential operation circuit and a logarithmic operation circuit. The input control circuit is used for controlling the first calculation circuit to read input data and an input parameter and controlling, on the basis of a first instruction received, said operation circuits in the calculation subcircuits that the first calculation circuit comprises to perform calculations with respect to the input data and the input parameter. The data processing circuit not only implements basic multiplication and accumulation operations, but also implements via the first nonlinear operation circuits more complicated operations such as logarithmic operations and exponential operations or exponentiations, thus adapting to more neural network-layer calculations.
Patent WO-2020186539-A1 (WO)
Title: 产品性能测试方法及系统
Inventor: YANG ZONGHUI
IPC: G01N25/00
Filed: 2019-03-25
Abstract: 一种产品性能测试方法及系统。所述产品性能测试方法包括：至少测试样品的蓄热材料比热容C、传热系数K、制冷系统能效比E、样品所含蓄热材料质量m，从而探知样品的性能水平。所述方法通过测试产品的材料比热容C、传热系数K、制冷系统能效比E、箱体内蓄热材料质量m四个关键因子，从影响产品性能的关键影响因子入手，使得本测试方法更科学更合理，避免因人为设定某几个点(例如GB/T 33861-2017中所设定的恒温能效考核点)考核产品性能所带来的局限性，且本测试方法操作简单，能够显著降低测试工作量和测试难度。
Patent WO-2020191767-A1 (WO)
Title: Procédé et dispositif de distribution d'identifiant de capacité
Inventor: LIU JIANHUA
IPC: H04W8/22
Filed: 2019-03-28
Abstract: La présente invention concerne un procédé de distribution d'identifiant de capacité, apte à distribuer efficacement un identifiant de capacité pour un dispositif terminal, à diminuer le surdébit de signalisation provoqué par un rapport et un stockage d'informations de capacité. Le procédé comprend les étapes suivantes : un dispositif terminal, dans un processus de strate de non-accès (NAS), acquiert un identifiant de capacité d'un dispositif de réseau pour une distribution au dispositif terminal ; ou, le dispositif terminal, dans un processus de commande de ressources radio (RRC), acquiert ledit identifiant de capacité ; l'identifiant de capacité étant utilisé pour identifier des informations de capacité du dispositif terminal.
Patent WO-2020042617-A1 (WO)
Inventor: LIU HE
IPC: A61F5/14
Filed: 2019-04-09
Abstract: La présente invention concerne une semelle (10), comprenant un corps principal de semelle (110), et une première partie de correction (120) et une seconde partie de correction (130) qui font saillie depuis une surface du corps principal de semelle (110) et qui sont disposées de l'avant vers l'arrière au niveau d'un intervalle mal aligné. La semelle présente une structure simple, est pratique à préparer et utiliser, et peut corriger et empêcher les déformations du gros orteil sans chirurgie. L'invention concerne en outre une chaussure et un dispositif de correction du gros orteil.
Patent WO-2020010902-A1 (WO)
Title: Cutter state detection system
Inventor: LIN WEIHSIANG
IPC: B23Q17/09
Filed: 2019-04-28
Abstract: A cutter state detection system (1). A C-shaped clamping ring (14) or a magnetic block body (17) is used as an assistive tool, and a sensor (11) is provided on a machine main shaft (21) of a tool machine (2) to sense the effect brought by a cutter (22) on the machine main shaft (21) during task execution, so that the state of the cutter (22) is detected in real time, without spending extra time in detecting the cutter (22), and a current available state of the cutter (22) can be effectively known, thereby improving the use efficiency of the cutter (22).
Patent WO-2020220181-A1 (WO)
Title: A speaker with broadcasting mode and broadcasting method thereof
Inventor: TSUI CHI HO
IPC: H04M1/72412
Filed: 2019-04-29
Abstract: A speaker, a multi-speaker system, with broadcasting mode and a method for implementing the broadcasting are disclosed. In the broadcasting mode, the speaker is able to re-broadcast the audio stream from the speaker connecting to the audio playing device to multiple speakers. By using simple and intuitive one-button press, the speaker enters the broadcasting mode can switch between the receiver and broadcaster roles automatically without user intervention.
Patent WO-2019214668-A1 (WO)
Title: Aperiodic channel state information computation for cross-carrier scheduling
Inventor: WU LIANGMING
IPC: H04L5/00
Filed: 2019-05-09
Abstract: Certain aspects of the present disclosure provide techniques for aperiodic channel state information (A-CSI) feedback scheduling for cross-carriers. Certain aspects provide a method for wireless communication. The method generally includes receiving on a first component carrier (CC) signaling indicating an aperiodic channel state information (CSI) report request for a plurality of CCs; determining schedules for at least CSI reference signal (CSI-RS) transmissions on the CCs based on the received signaling; monitoring CSI-RS transmissions on the CCs according to the determined schedules; and reporting CSI feedback based on CSI-RS measurements of the CSI-RS transmissions.
Patent WO-2020232627-A1 (WO)
Inventor: ZHU CHENXI
IPC: H04W72/04
Filed: 2019-05-21
Abstract: Apparatuses, methods, and systems are disclosed for determining signal-to-interference ratios. One method (700) includes transmitting (702) information indicating resources for determining a set of signal-to-interference ratios. For each signal-to-interference ratio of the set of signal-to-interference ratios the resources include: a first channel state information reference signal resource for channel measurement; and a second channel state information reference signal resource for interference measurement. The method (700) includes receiving (704) a report determined based on the information.
Patent WO-2020062897-A1 (WO)
Inventor: ZHANG WEI
IPC: G05B19/418
Filed: 2019-05-22
Abstract: A communication-type control-based multi-process manufacturing method for food made and sold onsite, comprising the following steps: defining a control command protocol respectively for each food processing equipment involved in a food manufacturing process (S1); combining the control command protocol of each food processing equipment according to the flavor of food so as to form control command protocol combination lists corresponding to processing procedures for different flavors of foods (S2); calling a corresponding control command protocol combination list according to an obtained food flavor manufacturing command, and sending each control command protocol within the control command protocol combination list to a corresponding food processing equipment according to processing procedures so that the food processing equipment executes a corresponding food processing action according to the received control command protocol (S3). The present invention achieves a seamless link between sequential processing procedures, wherein part of the processing procedures may be executed synchronously so that a food processing period is further shortened, which shortens the wait time for purchasing food made onsite.
Patent WO-2019228457-A1 (WO)
Inventor: LIU FENGJUAN
IPC: H01L21/336
Filed: 2019-05-30
Abstract: 一种薄膜晶体管及其制造方法、阵列基板及其制造方法。该薄膜晶体管包括：衬底基板(100)；位于所述衬底基板(100)上的栅电极(104)、有源层(108)、源电极(112s)和漏电极(112d)；所述薄膜晶体管还包括位于所述有源层(104)和所述衬底基板(100)之间的遮光部(102)，其中所述遮光部(102)包括凹槽(130)，所述有源层(108)位于所述凹槽(130)中。通过将有源层(108)设置在遮光部(102)的凹槽(130)中，能够减少甚至阻挡入射到有源层(108)的侧表面上的光。
Patent WO-2020042723-A1 (WO)
Title: 一种温控方法和装置
Inventor: HE ZHIBIN
IPC: H02J7/00
Filed: 2019-06-12
Abstract: 本申请实施例公开了一种温控方法和装置，所述温控方法包括：监测电池支路的温度；当第x个电池支路的温度大于或等于第一温度阈值，或第x个电池支路的温度和第y个电池支路的温度之差大于或等于差值阈值时，降低或断开第x个电池支路的以下至少之一：供电电流、充电电流；其中，x，y为大于或等于1，且小于或等于n的整数，n为电池中并联的电池支路的数量，x，y的取值不同。
Patent WO-2020133966-A1 (WO)
Title: 锚点确定方法及装置、电子设备和存储介质
Inventor: CHEN KAI
IPC: G06T7/00
Filed: 2019-06-21
Abstract: 一种锚点确定方法及装置、电子设备和存储介质，所述方法包括：对待处理图像进行特征提取，得到所述待处理图像的第一特征图(S11)；通过锚点预测网络对所述第一特征图进行锚点预测，得到所述第一特征图中生成锚点的位置信息和所述锚点的形状信息(S12)。
Patent WO-2020258418-A1 (WO)
Inventor: TSENG CHANGHO
IPC: H01L51/50
Filed: 2019-07-19
Abstract: The present invention provides an organic light emitting display apparatus, comprising multiple organic light emitting units. Each organic light emitting unit comprises a lower electrode provided on a substrate, an organic light emitting layer provided on the lower electrode, and an upper electrode provided on the organic light emitting layer. The lower electrode comprises a lower electrode first portion and a lower electrode second portion arranged in a stacked manner. The lower electrode first portion is provided on the substrate. An included angle between a side edge of the lower electrode first portion and the substrate is greater than or equal to 90 degrees. The lower electrode second portion is provided on the lower electrode first portion. An included angle between a side edge of the lower electrode second portion and a top surface of the lower electrode first portion is less than 90 degrees. The apparatus further comprises a pixel definition layer provided between the multiple organic light emitting units and covering a side edge of the lower electrode. The pixel definition layer is formed into a film according to the shape of the side edge of the lower electrode. The organic light emitting layers of the multiple organic light emitting units comprise multiple organic film layers. At least part of the organic film layers are disconnected at the pixel definition layer.
Patent WO-2020029824-A1 (WO)
Title: Incoming call prompt method, device, and system
Inventor: ZHANG YUNHUA
IPC: H04M3/42
Filed: 2019-07-29
Abstract: The present disclosure relates to an incoming call prompt method, a device, and a system, belonging to the field of communication technology. Said method comprises: a server receiving a call request sent by a calling terminal and carrying a called number; the server determining identification information corresponding to the called number; and the server sending, to a called terminal corresponding to the called number, a call notification carrying the identification information. With the method provided in the embodiments of the present disclosure, a called user may determine, according to the identification information, the group of people to which a calling user belongs, and then determine, according to the current situation of the called user, whether to answer the incoming call. Furthermore, the method avoids interference with ongoing work a called user caused by answering an unimportant incoming call mistakenly, and also prevents the called user from missing an important event because of missing an important incoming call. Thus, the method provided in the embodiments of the present disclosure reduces the mistaken operation rate of the called user.
Patent WO-2020034861-A1 (WO)
Title: Communication method and device
Inventor: LI HANCHENG
IPC: H04W76/11
Filed: 2019-08-05
Abstract: Disclosed by the present application are a communication method and device, relating to the field of communications and intended to distinguish user flow between an AN network element and a UPF network element. The communication method comprises: a session management function network element sending to a user plane function network element session information and first ID information, or sending to the user plane function network element the session information and user plant function network element indication information; and the session management function network element sending to an access network element the session information and the first ID information.
Patent WO-2020164233-A1 (WO)
Inventor: ZOU LI
IPC: G06F17/50
Filed: 2019-08-09
Abstract: 本发明公开了一种喷射式挖沟机喷嘴的一种参数设计及其数值模拟方法，其特征在于具有如下步骤：S1、喷嘴参数的设计；S2、喷嘴参数的选取；S3、几何模型的建立；S4、边界条件设定和网格划分；S5、利用Flow-3D进行数值模拟；S6、结果处理及分析。本发明可以模拟喷嘴冲刷破土的整个过程并测取冲刷沟剖面的尺寸，对得到的结果进行分析可验证喷嘴半径参数设计的合理性以及为倾斜角度参数的设计提供了一定参考。
Patent WO-2020038417-A1 (WO)
Title: Display correction method and apparatus, and device and storage medium
Inventor: FU CHUN
IPC: G09G3/20
Filed: 2019-08-21
Abstract: A display correction method, a display correction apparatus, a device and a storage medium. The method comprises: acquiring a first color parameter value of a first display screen at the current moment (101); acquiring a second color parameter value of a second display screen at the current moment (103); determining an adjustment parameter value according to a ratio of the first color parameter value to the second color parameter value (105); adjusting the second color parameter value according to the adjustment parameter value (107); and controlling a display color of the second display screen according to the adjusted second color parameter value, such that the display color difference of the same color between the first display screen and the second display screen is kept within a pre-set range (109).
Patent WO-2021035726-A1 (WO)
Inventor: JIN XUSHEN
IPC: H01B7/08
Filed: 2019-08-30
Abstract: A light-emitting flat cable structure (10). The light-emitting flat cable structure includes a first light-emitting module (150), a light guide member (170), a plurality of signal lines (100), a first fixing portion (130) and a second fixing portion (140), wherein the first light-emitting module is used for generating rays of light; the light guide member includes a first side edge and a second side edge that are located on opposite sides; the first side edge of the light guide member is connected to the first light-emitting module so as to guide rays of light generated by the first light-emitting module; each signal line is used for transmitting a power supply or a data signal; the first fixing portion is assembled on the plurality of signal lines, and the first light-emitting module and the first side edge of the light guide member are arranged on the first fixing portion; and the second fixing portion is assembled on the plurality of signal lines, and the second side edge of the light guide member is arranged on the second fixing portion. The light-emitting flat cable structure can not only emit rays of light during a signal transmission process so as to increase a visual effect, but also display a specific light emission pattern so as to enhance the aesthetic appearance of the light-emitting flat cable.
Patent WO-2020048482-A1 (WO)
Inventor: GUO ZHENWEN
IPC: B07B7/04
Filed: 2019-09-04
Abstract: 一种用于分散粘性物料的方法及其装置，包括在可调支座上设有的混合喷料箱(4)，该混合喷料箱(4)的上部为供料仓(1)、供料仓(1)的底部设有可调控料装置(6)，该混合喷料箱(4)的尾部设有离心鼓风机(2)，该离心鼓风机(2)的一端设有气体喷射管(3)；所述可调控料装置(6)在所述气体喷射管(3)的上方；混合喷料箱(4)的头部为喷料管(5)，该喷料管(5)伸入分料箱体(8)内部，该分料箱体(8)内部呈N形，N形的左斜边为粗料撞击板(7)，N形的右边为细料撞击板(81)，粗料撞击板(7)和细料撞击板(81)的位置下方分别对应设置粗料和细料的下料口；分料箱体(8)上部与旋风分离器(10)相连，所述旋风分离器(10)下方设置粉料下料斗；旋风分离器(10)以管道与离心鼓风机(2)的进气口连接。该装置采取气流喷射加撞击的方法，对粘结料予以分散，以提高下道分选的效率。
Patent WO-2021035815-A1 (WO)
Inventor: LI MINGMING
IPC: C21B13/14
Filed: 2019-09-12
Abstract: L'invention concerne un système et un procédé de production directe d'acier à réduction d'éclair totalement à l'hydrogène et à énergie électrique. Le système comprend un dispositif de production d'hydrogène à eau électrolytique, un four de réduction d'éclair à cyclone, un four de fusion par chauffage électrique et un dispositif de post-traitement de gaz résiduaire. Le procédé est le suivant : l'hydrogène servant de gaz réducteur et l'oxygène sont préparés par électrolyse de l'eau ; l'oxygène et la poudre de production d'acier sont pulvérisés dans le four à réduction d'éclair à cyclone, et pendant ce temps, l'hydrogène est soufflé dans la partie inférieure de celui-ci ; les phases gazeuses et solides subissent une réaction de réduction à 500-1 500 °C pendant le mouvement à contre-courant dans le four à cyclone pour obtenir de la poudre de fer pré-réduite/des gouttelettes de fer ayant un rapport de métallisation supérieur à 80 % qui entrent dans le four de fusion à chauffage électrique pour la fusion ; l'hydrogène est soufflé dans le fond du four de fusion à chauffage électrique pour être agité et fondu pour une réduction finale, et la production d'acier en continu est réalisée ; le gaz résiduaire est réduit et fondu, et la poudre est préchauffée/pré-réduite, et la purification par élimination de poussière est effectuée ; le gaz résiduaire est purifié, l'oxygène est préchauffé et la séparation par condensation est effectuée ; l'hydrogène revient au four de réduction d'éclair à cyclone et l'eau condensée retourne à l'eau électrolytique pour produire de l'hydrogène. Le procédé dans sa totalité utilise l'énergie électrique pour la fusion sans s'appuyer sur un combustible fossile, utilise totalement l'hydrogène en tant qu'agent réducteur, et il n'y a pas d'émission de polluant dans le procédé, ce qui permet d'obtenir une utilisation efficace et cyclique de matières premières et une fusion propre.
Patent WO-2021051267-A1 (WO)
Title: Mounting assembly and method for accommodating optical assembly by means of mounting assembly
Inventor: ZHOU SHOUYONG
IPC: F21S8/00
Filed: 2019-09-17
Abstract: A mounting assembly (10) and a method for accommodating an optical assembly by means of the mounting assembly (10). The mounting assembly is configured to selectively accommodate a first optical assembly (300) or a second optical assembly (400). The mounting assembly (10) comprises a frame (100) and a plate (110). The frame (100) comprises a first hole (120) configured to receive the first optical assembly (300). The plate (110) comprises a second hole (130) configured to receive the second optical assembly (400), and the plate (110) is removably coupled to the frame (100), wherein the first hole (120) and the second hole (130) are different in at least one of shape and size.
Patent WO-2020057534-A1 (WO)
Inventor: CHENG WEIQIANG
IPC: H04J3/16
Filed: 2019-09-18
Abstract: Some embodiments of the present disclosure provide a service processing method and device. The method comprises: identifying idle code blocks from a first code block traffic corresponding to a first service; replacing the idle code blocks with first code blocks used by a second service; mixing second code blocks used by the first service and the first code blocks used by the second service in the first code block traffic to obtain a second code block traffic; and sending the second code block traffic obtained by the mixing to a receiving end.
Patent WO-2021027017-A1 (WO)
Title: 显示面板及其制作方法
Inventor: XU ZUZHAO
IPC: H01L27/15
Filed: 2019-09-20
Abstract: 一种显示面板（100）及其制作方法，显示面板（100）包括衬底（201）、位于衬底（201）上的第一绝缘层、位于第一绝缘层上的源漏极层图案及柔性层图案（500）；源漏极层图案包括源极（2101）、漏极（2102）；柔性层图案（500）包括至少一开口（52），显示面板（100）中的源极（2101）、漏极（2102）位于开口（52）内；开口（52）与至少一源极（2101）及至少一漏极（2102）对应。
Patent WO-2020063563-A1 (WO)
Inventor: VILAIPORNSAWAI USA
IPC: H04L1/08
Filed: 2019-09-24
Abstract: A method of using multiple diversity domains for data repetition is provided. A diversity mode indicator is set to one diversity mode indicator value of a plurality of diversity mode indicator values. Each diversity indicator value is associated with a respective combination of one or more diversity domains for data repetition. Following that, transmitting or receiving a plurality of repetitions is performed based on the one diversity mode indicator value. For at least one of the diversity mode indicator values, the respective combination of one or more diversity domains for repetition comprises space.
Patent WO-2020199534-A1 (WO)
Inventor: SHEN ZHIHUA
IPC: G09G3/3233
Filed: 2019-09-25
Abstract: A display device and a display panel (1) thereof, and a pixel drive circuit of the display panel (1). By changing the width-to-length ratio of a drive transistor (X2) in the pixel drive circuit of each sub-pixel or changing the size of a storage capacitor (C) at the same time, the width-to-length ratio of the drive transistors (X2) of sub-pixels of the same color (11a, 11b, 11c) is in direct proportion to a drive current under a same gray scale; or at the same time, the charging saturation of the storage capacitors (C) of the sub-pixels of the same color (11a, 11b, 11c) is the same, the size of the storage capacitors (C) of the sub-pixels of the same color (11a, 11b, 11c) is in direct proportion to the drive current, and the charging saturation is a difference between an actual charging voltage and a theoretical overshoot voltage of the storage capacitors (C) at the end of a charging stage. By means of configuration of the product structure, a same data voltage is applied to the sub-pixels of the same color (11a, 11b, 11c), and the drive current flowing through the sub-pixels of the same color (11a, 11b, 11c) can achieve a display effect of consistent brightness; in Gamma adjustment, a large number of calculations are carried out on different pixels at different moments in order to obtain data voltages capable of enabling brightness to be consistent, and the requirement for the drive capacity of a drive chip is lowered.
Patent WO-2020078352-A1 (WO)
Title: Catalyst component and catalyst for olefin polymerization, and application thereof
Inventor: ZHAO JIN
IPC: C08F4/654
Filed: 2019-10-15
Abstract: Disclosed are a catalyst component and a catalyst for olefin polymerization, and an olefin polymerization method. The catalyst component comprises magnesium, titanium, a halogen and an internal electron donor, wherein the internal electron donor comprises a monocarboxylic acid ester compound and a diether compound, and the molar ratio of the monocarboxylic acid ester compound to the diether compound is (0.0035-0.7) : 1. By using the catalyst, a polymer having both a high isotactic index and a high melt flow index can be prepared.